Direct2D programming

[Alice]

What is the easiest way to do Direct2D programming with Go?

Any short example would be appreciated.

[Jeroen Dirks]

I think that Direct2D is a C++ API. (I think it is possible to do raw
Direct2D coding in C only but that is very painful.)

So it is not directly usable from Go.

Your best bet is to use SWIG to make a Go wrapper of the C++ API and
then use your Go API to do Direct2D programming.

(Unless someone already made a Go wrapper for Direct2D/DirectX then
use their Go API)

[Ethan]

Hmm, correct me if I'm wrong, although DirectX API is C++, it exports all the functionality through a C interface, which Go can talk with directly.

[Krzysztof Kowalczyk]

Yes, DirectX is COM which is C++ but with a stable ABI (layout of
virtual table, calling conventions) and therefore can be called from
plain C (http://www.codeproject.com/KB/COM/com_in_c1.aspx) therefore
one should be able to write a wrapper in Go like for any other C code.

But as Jeroen said, it's painful.

-- kjk

[lars....@googlemail.com]

I have created a Go wrapper for Direct3D9 with which you can also render 2D graphics: https://github.com/gonutz/d3d9

My entry to the GopherGala 2016 was a simple 2D game utilizing this wrapper: https://github.com/gonutz/gophette

Also the "samples" folder in the d3d9 wrapper gives you some basic starting points on how to use D3D9 in Go.